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mkopcodec.awk

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#!/usr/bin/awk -f

# This AWK script scans the opcodes.h file (which is itself generated by

# another awk script) and uses the information gleaned to create the

# opcodes.c source file.

# Opcodes.c contains strings which are the symbolic names for the various

# opcodes used by the VDBE. These strings are used when disassembling a

# VDBE program during tracing or as a result of the EXPLAIN keyword.

BEGIN {

print "/* Automatically generated. Do not edit */"

print "/* See the mkopcodec.awk script for details. */"

printf "#if !defined(SQLITE_OMIT_EXPLAIN)"

printf " || defined(VDBE_PROFILE)"

print " || defined(SQLITE_DEBUG)"

print "#if defined(SQLITE_ENABLE_EXPLAIN_COMMENTS) || defined(SQLITE_DEBUG)"

print "# define OpHelp(X) \"\\0\" X"

print "#else"

print "# define OpHelp(X)"

print "#endif"

print "const char *sqlite3OpcodeName(int i){"

print " static const char *const azName[] = { \"?\","

mx = 0

}

/^.define OP_/ {

sub("OP_","",$2)

i = $3+0

label[i] = $2

if( mx<i ) mx = i

for(j=5; j<NF; j++) if( $j=="synopsis:" ) break

if( j<NF ){

j++

x = $j

for(j=j+1; j<NF; j++) x = x " " $j

synopsis[i] = x

}else{

synopsis[i] = ""

}

END {

for(i=1; i<=mx; i++){

printf " /* %3d */ %-18s OpHelp(\"%s\"),\n", i, \

"\"" label[i] "\"", synopsis[i]

}

print " };"

print " return azName[i];"

print "}"

print "#endif"

}